Which statement about enzyme inhibitors is not true?

a. A competitive inhibitor binds the active site of the enzyme.

b. An allosteric inhibitor binds a site on the active form of the enzyme.

c. A noncompetitive inhibitor binds a site other than the active site.

d. Noncompetitive inhibition cannot be completely overcome by the addition of more substrate.

e. Competitive inhibition can be completely overcome by the addition of more substrate.

In which of the following does an inhibitor bind to an allosteric site on an enzyme? a. competitive inhibition b. noncompetitive inhibition c. redox reactions d. None of the above are correct.

What happens when an inhibitor binds to an allosteric site on an enzyme?

Which statement about thermodynamics is true?

a. Free energy is used up in an exergonic reaction.

b. Free energy cannot be used to do work.

c. The total amount of energy can change after a chemical transformation.

d. Free energy can be kinetic but not potential energy.

e. Entropy has a tendency to increase.

The allosteric enzyme ATCase is regulated by CTP, which binds to the T-state of ATCase. CTP is a:

A) positive regulator.

B) negative regulator.

C) co-factor.

D) competitive inhibitor.

E) coenzyme.

According to the principle of complementary base pairing, purines always pair with ________.

In which of the following does an inhibitor bind to an allosteric site on an enzyme?
a. competitive inhibition
b. noncompetitive inhibition
c. redox reactions
d. None of the above is correct.

Enzymes are potent catalysts because they:

A. Are very specific and can prevent the conversion of products back to substrates

B. Are consumed in the reactions they catalyze

C. Drive reactions to completion while other catalysts drive reactions to equilibrium

D. Increase the equilibrium constants for the reactions they catalyze

E. Lower the activation energy for the reactions they catalyze

Enzymes are potent catalysts because they:

A) are consumed in the reactions they catalyze.

B) are very specific and can prevent the conversion of products back to substrates.

C) drive reactions to completion while other catalysts drive reactions to equilibrium.

D) increase the equilibrium constants for the reactions they catalyze.

E) lower the activation energy for the reactions they catalyze.

Which of the following is not true about enzymes: a. They increase $\Delta G$ of reactions, b. They are usually made of amino acids, c. They lower the activation energy of, chemical reactions, d. Each one is specific to the particular substrate(s) to which it binds.

Which of the following is not true about enzymes?

A. Enzymes are catalysts and, therefore, increase the rate of a reaction while not being permanently altered by the reaction.

B. Enzymes are proteins that can be denatured by changes in pH temperature.

C. Enzymes are highly specific for the substrates they react with and catalyze only one or a limited set of possible reactions with those substrates.

D. Enzymes do not show a saturation effect.

How is trypsinogen converted to trypsin?

A) A protein kinase-catalyzed phosphorylation converts trypsinogen to trypsin.

B) An increase in Ca2+ concentration promotes the conversion.

C) Proteolysis of trypsinogen forms trypsin.

D) Trypsinogen dimers bind an allosteric modulator, cAMP, causing dissociation into active trypsin monomers.

E) Two inactive trypsinogen dimers pair to form an active trypsin tetramer.

What is the difference between DNA sugar and RNA sugar?

Ethylene glycol (antifreeze) has a density of 1.11 $g/cm^3$. a. What is the massing of 417 mL of ethylene glycol? b. What is the volume in L of 4.1 kg of ethylene glycol?